I'm having this problem on a Windows 2003 server. This box scanned fine at first and now it won't, nothing has changed as far as I know. See attached screenshot.
It does not have any firewalls on it. It has a great connection to the LAN, the Lansweeper server sits right next to it, plugged into the same switch. I've rebuilt WMI, tested WMI (tests fine, says it's good). DCom looks fine, i've tested and done everything in the knowlegebase. Need help before I go insane!